Hey Rob,
That really sucks
What fuel were you running?
Also, were you running the 2.5" pulley that comes in the FF power package?
Finally do you have any idea what kind of timing and AFRs you had? Perhaps you could email me your map so that I can see it? I'd be happy to post what not to do so that others don't fall to the same fate. I know that doesn't help you, but getting some decent guidelines to tune from would be helpful for others... Which, reminds me that I need to post up my timing figures for others as well...
I have one concern about the power pack deal from FF and that revolves around that 2.5" pulley. 2.5" pulley's spin the blower to about 17 psi (pre IC) and about 330 degree charge temps, as we've learned from Frank's (Ronin) car. It also seems that the stock IC has about a 3psi pressure drop and is only about 50% efficient. In light of that, if amb temp was 100ish, you're post IC intake temps are still 200F+ with some 14ish psi boost
That's a lot of cylinder pressure- particularly with the stock high compression engine. Intuitively, it would seem that it might be enough pressure to pop an unopened engine (read, stock high compression), with just about any level of tune.
Disclaimer: I can't say for cetain that the the above engine combo is spelling disaster on the track, but it sure doesn't look great on paper... Perhaps with some really good gas it may be OK???
Again, I can take a look at your map and tell you what I think based on what works on my car with 91 octane...
Obviously the EFI didn't kill your engine. However, short of a fuel starve, it's certainly likely that a combination of aggressive tuning, high boost, and high charge temps, lead to the detonation that killed your engine... It would be real nice to know what that combination is exactly to avoid it for others...
Best of luck getting the car back together. Let me know if I can help in any way!
Phil